The Earthway 199445 Deluxe Lawn & Garden Spreader 65 lbs. Capacity is a great fertilizer to use for your backyard. You can get it at Ace Hardware for around $70.
You can purchase a compatible fertilizer spreader at certain garden equipment suppliers that have a large selection of heavy and light weight garden machinery.
With that much land getting the best is wise. I recommend fertilizer spreaders from Vicon, they make quality products that last forever.
Setting for scotts rotary spreader of 13-13-13 fertilizer?
Spreadersettings.netau.net
The correct setting for both spreaders is 3
A broadcast spreader is used to spread seed, fertilizer or sand over a large area. It is commonly used on farms and is an alternative to using a drop spreader.
If you are using the Vigoro Ultra Turf Lawn Fertilizer(29-0-4) with the Scotts Standard Broadcast Spreader then the setting would be 5.
I would go with a broadcast spreader and use dry fertilizer , might be safer than using liquid fertilizer with a sprayer.
You can find fertilizer spreaders online at Home Depot, Rona, Lowe's websites, as well as sites such as eBay and Amazon.
Use number 4.5 to 5.0
For a drop spreader 7, broadcast 5
Salt spreaders are used to spread salt onto a surface in order to melt ice and snow in the winter, making it safer to walk and drive. It is possible to use a salt spreader to spread fertilizer, but the spreader must be cleaned very well between uses to prevent contamination.
The Scotts spreader has a dial on there they call a micrometer. The settings on the dial are tested specifically with their products and their spreader. I'm not sure how they compare as I've never seen the Sears spreader. The Scotts Company's consumer services division keeps a list of many spreader types and can often help with setting the spreader before applying their product. You may want to contact them. Look them up at www.scotts.com.
Wet spray is always a better way to go because you get a even coating over your lawn. You also have a lower chance of burning your lawn with a wet fertilizer.